70855821583 has 2 divisors, whose sum is σ = 70855821584. Its totient is φ = 70855821582.

The previous prime is 70855821559. The next prime is 70855821599. The reversal of 70855821583 is 38512855807.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70855821583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70855821583.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70855821683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35427910791 + 35427910792.

It is an arithmetic number, because the mean of its divisors is an integer number (35427910792).

Almost surely, 2^70855821583 is an apocalyptic number.

70855821583 is a deficient number, since it is larger than the sum of its proper divisors (1).

70855821583 is an equidigital number, since it uses as much as digits as its factorization.

70855821583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688000, while the sum is 52.

The spelling of 70855821583 in words is "seventy billion, eight hundred fifty-five million, eight hundred twenty-one thousand, five hundred eighty-three".